High becoming low on Monday due to uncertainties regarding how far north and how quickly a frontal system bringing rain, snow and milder air pushes northwestwards across Scotland.
Rather cloudy with frequent heavy and blustery snow showers. Severe westerly gales.
Progress will be impeded by very strong winds. Walking will be difficult and strenuous at times with a potential for one to be blown over in gusts. There can be a marked increase in winds through cols or on exposed ridges and summits. Distances often take longer to cover with compass bearings becoming more difficult to follow accurately.
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.
Blizzards and whiteouts present challenging and serious conditions due to a combination of falling or blowing snow, strong winds and cold temperatures. They can be highly disorientating, often resulting in near-zero visibility with limited or no visual references and no distinction between ground and sky. Cliff edges and cornices may not be apparent, even close up. These conditions require very good navigational skills.
Expect snow to rapidly accumulate with deep drifts also possible during windy conditions. Progress will be time consuming and physically strenuous, which will significantly affect the distance one is able to travel on foot. Paths will become hidden and difficult to follow, while very poor visibility during snowfall will make route-finding challenging. A heightened avalanche risk is likely and avalanche reports should be consulted where available.
Walking will be very strenuous with any mobility virtually impossible over exposed ground. There is a high likelihood of being blown over or taken off one’s feet, while even standing up may be impossible at times. Basic tasks such as using a map, eating, putting on extra clothing or communication become extremely difficult away from any shelter.
Lightning is a significant mountain hazard which can result in serious injury or death. Mountain terrain often leaves one highly exposed to lightning strikes. Hail may give unpleasant conditions with torrential rain and localised flash flooding also possible, mainly in Summer months.
Blustery snow showers and very windy
|Chance of precipitation|
|1100m||W 47 58||NW 44 53||NW 38 46||NW 35 43||NW 36 44||NW 32 40||NW 30 36||NW 27 33|
|900m||W 35 45||NW 27 35||NW 25 32||NW 25 33||NW 24 32||NW 22 29||NW 20 27||NW 19 26|
|600m||W 34 44||W 25 32||W 20 26||W 22 28||W 22 29||W 21 28||SW 19 24||SW 15 19|
|300m||NW 22 35||W 12 19||W 11 15||NW 11 16||NW 10 17||NW 8 14||SW 7 11||W 6 10|
|Glen||W 14 34||SW 6 18||SW 5 11||W 5 14||NW 7 20||NW 7 19||NW 5 14||W 5 13|
Clear spells and heavy, blustery snow showers through the early hours with a risk of thunder, the showers combined with the winds giving temporary blizzard conditions. The showers largely die out soon after dawn, just a few continuing across Mull, western Argyll and Arran with some good spells of sunshine developing, but some poor walking conditions are still likely with lying snow blowing and drifting in the strong winds.
Around 40% at dawn with occasional cloud above 750m lowering to 450m at times in association with showers rising to about 80% soon after dawn with patches of cloud above 750m.
Poor or very poor in snow showers and near zero in temporary blizzards and blowing or drifting snow, but becoming mainly very good or excellent with some good views of recently snow covered hills developing.
Gusts over ridges and summits close to 65mph at least through the early hours slowly easing, producing a severe chill effect.
Mainly dry with some good spells of sunshine, however cloud increasing above the summits through the afternoon with outbreaks of snow spreading northeast through the evening.
Very good or excellent falling poor in snow showers and snow later and very poor in any drifting or blowing snow at first.
Around 80% with occasional cloud above 750m, falling during the evening as cloud bases lower.
Northwesterly around 30mph, gusts over ridges and summits around 45mph, gradually backing southerly and decreasing 15mph or less.